I like how it works and looks, except it is missing: 1) search in notes and 2) categorizing notes into expandable (sub)folders + being able to move items between these.

Awesome add-on.
Works flawlessly

Pros:
auto backups, rich text editor,
compression and encryption. The firefox-sync feature is really smart and lets the user sync his notes across devices without the need of other cloud service.

Cons: None

Suggestions for more features:
1. Ability to create folders
2. Ability to autosave backups in custom locations
3. Search in notes

Jurai Messiar, a cool addition that deserves 5 stars!!! I can even change the password, version 4.2 I really liked it!

Fantastic addon

This has a lot of potential. I would only want to add the option to create separate folders for notes.

This is a great app. Unless you're the type of person whose password is "Password1", this is a super secure app and really easy to use, I use this extension on both Firefox and Chrome.

There is no "Find" or 'Replace' function

Far better than Firefox Notes

I'm kinda impressed (after only 1h of usage :D), that might be best substitute so far, for recently disabled Firefox Notes, which I've really enjoyed using. Synchronisation between browsers works nice. Not sure why it has so low number of users. Keep up good work!

Update:
After a year, I'm still impressed, addon is wonderful!

Also I've found a minor bug, somehow one of my notes got locked (maybe I've clicked something by mistake), and I couldn't unlock it (all of my notes are unlocked without password), so finally I've imported one of older backups, when it was unlocked, but after few hours it got locked again and surprisingly now I have two locked notes (it has copied itself somehow, probably after import). Anyway, it would be nice to have possibility to delete separate notes, even they are locked (those two locked notes irritates me).

My most useful add-on. Looking exactly for this and finally found it. Notes managing is so easy and UI, Text editor, Backup, Import/Export all that makes notes taking handy and useful. Recommended to everyone for daily use.

Great addon!
I suggest you make creating a new note automatically take you to the new note without asking for a name, and the note title can appear in a field at the top to allow edit the name.